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RC5057 数据表(PDF) 4 Page - Fairchild Semiconductor |
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RC5057 数据表(HTML) 4 Page - Fairchild Semiconductor |
4 / 20 page RC5057 PRODUCT SPECIFICATION 4 REV. 1.2.0 2/10/00 Electrical Specifications (V CCA = 5V, VCCP = 12V, VOUT = 2.0V, and TA = +25°C using circuit in Figure 1, unless otherwise noted.) The • denotes specifications which apply over the full operating temperature range. Notes: 1. Steady State Voltage Regulation includes Initial Voltage Setpoint, Droop, Output Ripple and Output Temperature Drift and is measured at the converter’s VFB sense point. 2. As measured at the converter’s VFB sense point. For motherboard applications, the PCB layout should exhibit no more than 0.5m Ω trace resistance between the converter’s output capacitors and the CPU. Remote sensing should be used for optimal performance. 3. Using the VFB pin for remote sensing of the converter’s output at the load, the converter will be in compliance with Intel’s VRM 8.4 specification of +50, -80mV. If Intel specifications on maximum plane resistance from the converter’s output capac- itors to the CPU are met, the specification of +40, -70mV at the capacitors will also be met. 4. Includes gate current. Parameter Conditions Min. Typ. Max. Units Output Voltage See Table 1 • 1.3 3.5 V Output Current 18 A Initial Voltage Setpoint ILOAD = 0.8A, VOUT = 2.400V VOUT = 2.000V VOUT = 1.550V 2.394 2.000 1.550 2.424 2.020 1.565 2.454 2.040 1.580 V V V Output Temperature Drift TA = 0 to 70°C, VOUT = 2.000V VOUT = 1.550V • • +8 +6 mV mV Line Regulation VCCA = 4.75V to 5.25V, VOUT = 2.000V • ±2 mV Internal Droop3 VOUT at ILOAD = 0.8A to Imax -44 -40 -36 mV Output Ripple 20MHz BW, ILOAD = Imax 11 mVpk Total Output Variation, Steady State1 VOUT = 2.000V VOUT = 1.550V3 • • 1.940 1.480 2.070 1.590 V Total Output Variation, Transient2 ILOAD = 0.8A to Imax,VOUT = 2.000V VOUT = 1.550V3 • • 1.900 1.480 2.100 1.590 V Short Circuit Detect Current • 45 60 µA Efficiency ILOAD = Imax, VOUT = 2.0V 85 % Output Driver Rise & Fall Time See Figure 4 for tR and tF 50 nsec Output Driver Deadtime See Figure 7 for tDT 50 nsec Oscillator Frequency • 255 300 345 kHz Duty Cycle 0 100 % PWRGD Threshold Logic HIGH Logic LOW • • 93 88 107 112 %Vout VCCA UVLO • 3.74 4 4.26 V VCCP UVLO • 7.65 8.5 9.35 V VCCA Supply Current 19 mA VCCP Supply Current4 40 mA Soft Start Current • 510 17 µA |
类似零件编号 - RC5057 |
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类似说明 - RC5057 |
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